Forums - Trouble with Right channel cutting out

Geno

Seasoned Member

Posts: 167

Trouble with Right channel cutting out
05/06/18 at 19:31:53

My right channel has started periodically cutting out. At first, I thought that I had a tube going bad. A few times, I just cut the amp off and back on and it was fine. Then I realized that when it happens, all I have to do is lightly touch the amp on top front and it comes back on.

I don't have any isolation under my speakers or components. Could vibration be causing this?

Back to top

SE84UFO
Decware ZDSD DAC
PS Audio DS DAC JR
Cambridge Audio CXC
Technics PL 1210MK5-Goldring 1042
ZP3
Decware ZLC (inQ)
TEAC A-3300SR R2R
Caintuck Betsy Baffles
(2) 12” Alpha Bass Baffles
Mapleshade Double Helix+ spkr cable
Maplesh. & Decware interc.

IP Logged

ZYGI

Seasoned Member

HR-ONE

Posts: 725

Re: Trouble with Right channel cutting out
Reply #1 - 05/06/18 at 20:49:15

Geno,

Have you tried swapping output tubes from side to side? Or changed out the input tube with a spare? (we all know we need a spare set of tubes)

When you say "touching the are you getting a static discharge at the same time?

I'd also go ahead and work all the switches, cycling them a few time might help. Check that all connections are tight on both input RCA's and speaker terminals.

Hope you find the issue.
Zygi

Back to top

All Decware amps and sources, Turning Point Audio speakers

IP Logged

Acetone Seasoned Member 4+ years with my Decware and Loving it!!! Posts: 704	Re: Trouble with Right channel cutting out Reply #2 - 05/06/18 at 21:54:47 Check the tube pins. Dirty, or bent pins, might not be making good contact in the socket. wiggle each tube a bit next time it happens and see what's what!
Back to top	SE84-CKC & UFO25, ZP3, Zstage, ZRock2, ZSB, DM947-(946)Monoliths, VPI-Traveler-2M black. Philips CDR-880. Audio Envy/RAC-PC's & IC's, Mapleshade Dbl Helix+ Spk wire & jumpers, Blue Circle PLC FX2X0e. Herbies tube dampers, Tenderfoots, GIK, PI Audio, DIY panel IP Logged

Geno Seasoned Member Posts: 167	Re: Trouble with Right channel cutting out Reply #3 - 05/06/18 at 23:03:59 Guys, I have done all manner of tube checking. I think I am satisfied that it’s not a tube issue. Wouldn’t The fact that I can lightly put one finger on the body and have the channel come back on tell us that it’s either some kind of electrical interference or vibration problem?
Back to top	SE84UFO Decware ZDSD DAC PS Audio DS DAC JR Cambridge Audio CXC Technics PL 1210MK5-Goldring 1042 ZP3 Decware ZLC (inQ) TEAC A-3300SR R2R Caintuck Betsy Baffles (2) 12” Alpha Bass Baffles Mapleshade Double Helix+ spkr cable Maplesh. & Decware interc. IP Logged

4krow Seasoned Member IMAGINE WHIRLLED PEAS Posts: 1112	Re: Trouble with Right channel cutting out Reply #4 - 05/07/18 at 01:13:54 I would forget the tube trouble idea. If you are just touching the chassis and the right channel comes back on, it would indicate a cold solder joint or similar issue inside of the amp. It Might possibly be the tube socket itself, but either way, it is something that has to taken apart and repaired.
Back to top	Decware 34I.3 integrated amp/Forte' 3 bass amp/Velodyne SMS-1 bass mngmnt system/Decware ZOB speakers/Audio Nirvana 8" bass drivers/Xiang Seng DAC/ LR Audio Computer/Rega Apollo R CDP/Emotiva ERC3 CDP/BPT 3.0 power cond. IP Logged

Geno

Seasoned Member

Posts: 167

Re: Trouble with Right channel cutting out
Reply #5 - 05/07/18 at 02:36:37

4krow - a cold solder joint is what a friend of mine suggested it might be. Anyway, just to eliminate everything else, I took all the tubes out and cleaned the sockets. Then rechecked all interconnects and speaker connects. If it cuts out again, I will send it back to be checked out. Thanks to all above for your suggestions.

Back to top

SE84UFO
Decware ZDSD DAC
PS Audio DS DAC JR
Cambridge Audio CXC
Technics PL 1210MK5-Goldring 1042
ZP3
Decware ZLC (inQ)
TEAC A-3300SR R2R
Caintuck Betsy Baffles
(2) 12” Alpha Bass Baffles
Mapleshade Double Helix+ spkr cable
Maplesh. & Decware interc.

IP Logged

4krow Seasoned Member IMAGINE WHIRLLED PEAS Posts: 1112	Re: Trouble with Right channel cutting out Reply #6 - 05/07/18 at 03:13:21 Geno, Your doing this the right way. Easy things first. Then see what happens.
Back to top	Decware 34I.3 integrated amp/Forte' 3 bass amp/Velodyne SMS-1 bass mngmnt system/Decware ZOB speakers/Audio Nirvana 8" bass drivers/Xiang Seng DAC/ LR Audio Computer/Rega Apollo R CDP/Emotiva ERC3 CDP/BPT 3.0 power cond. IP Logged

Geno Seasoned Member Posts: 167	Re: Trouble with Right channel cutting out Reply #7 - 05/10/18 at 18:10:02 Knock on wood, after I cleaned the amp real good, it has done fine for about 12 hours listening or so. I did swap the output tubes around too, although I had tried that before. May have been as simple as a bad contact on one of the tubes. Fingers crossed that I don’t have this issue again.
Back to top	SE84UFO Decware ZDSD DAC PS Audio DS DAC JR Cambridge Audio CXC Technics PL 1210MK5-Goldring 1042 ZP3 Decware ZLC (inQ) TEAC A-3300SR R2R Caintuck Betsy Baffles (2) 12” Alpha Bass Baffles Mapleshade Double Helix+ spkr cable Maplesh. & Decware interc. IP Logged

Acetone Seasoned Member 4+ years with my Decware and Loving it!!! Posts: 704	Re: Trouble with Right channel cutting out Reply #8 - 05/16/18 at 17:23:46 Speaking of cleaning. It's time I got out the Caig Deoxit and cleaned all my connections. It's been over a year! Gino, does touching your unit still make a difference, or is all completely normal again?
Back to top	SE84-CKC & UFO25, ZP3, Zstage, ZRock2, ZSB, DM947-(946)Monoliths, VPI-Traveler-2M black. Philips CDR-880. Audio Envy/RAC-PC's & IC's, Mapleshade Dbl Helix+ Spk wire & jumpers, Blue Circle PLC FX2X0e. Herbies tube dampers, Tenderfoots, GIK, PI Audio, DIY panel IP Logged

Geno Seasoned Member Posts: 167	Re: Trouble with Right channel cutting out Reply #9 - 06/30/18 at 05:11:22 Ace, I’m sorry I haven’t responded. I just saw your post. After cleaning the amp and swapping output tubes around, it has not happened again. Thanks for mentioning cleaning the jacks. I have not done that yet and my amp is a year old now. Geno
Back to top	SE84UFO Decware ZDSD DAC PS Audio DS DAC JR Cambridge Audio CXC Technics PL 1210MK5-Goldring 1042 ZP3 Decware ZLC (inQ) TEAC A-3300SR R2R Caintuck Betsy Baffles (2) 12” Alpha Bass Baffles Mapleshade Double Helix+ spkr cable Maplesh. & Decware interc. IP Logged